Rotary pump



f Dec.1 5, 1925.

J. R. KINNEY Filedv July 25 Dec. l5, 1925- f 1.565.572

, J. Fe.l KINNEY ROTARY PUMP File@ July 23, 192:5 l 3 'Smets-sheet 2 Q Q M so ze o o 2 Je Q o o Q .c Q

Patented Dec. 15, 1925. i

UNITED STATES JUSTUS R. KINNEY, F BOSTON, MASSACHUSETTS.

ROTARY PUMP. i

Application inea July 2s, 1923. serial No. 653,095.

To all whom t may concern: v

Be it known that I, JUs'rUs R. KINNEY, a citizen of the United States of America, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a specification.

" 'This invention relates to rotary pumps and has for its object the production of a pump of this character in which the pumpl casing is provided with an annular passage communicating with the inlet and outlet, and in which passage one or more blades are adapted to travel and carry theliquid from said inlet to said outlet.

The invention consists in certain novel features of construction and arrangement of parts which will be understood readily by reference to the description of the drawings, and to the claims to be hereinafter given.

For the purpose of illustrating the invention, one preferred form thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized, and the invention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described, except as required by the scope of the appended claims.

Of the drawings:

Figure 1 represents a longitudinal vertical section of a pump embodying the principles of the present invention.

Figure. 2 represents a vertical section of Ysamel on line 2, 2 on Fig. 1,

Figure 3 `represents a vertical section of same on line 3, 3 on Fig. 1,

Figure 4 represents a vertical section of same on line 4, 4 on Fig. 1, and

Figure 5 represents a vertical section on line 5, 5 on Fig. 1.

Similar charactersA indicate like parts throughouty the seveial figures ofthe draw- 1n s.

n the drawings, is a base supporting a casing 11 having a c lindrical chamber 12 extending therethroug i. The opposite ends of the casing 11 are closed by plates 13 having annular flanges 14 extending toward each other intov the chamber 12, with their inner faces separated.

The end plates 13 are providedvwith outwhichvis mounted a housing 16 having a bearing 17 therein for a revoluble shaft 18 centrally disposed within the chamber 12.4

Keyed tothe shaft 18 within the chamber 12 is a hub 19 having a web 20 disposed between the separated inner faces of the flanges 14. On the periphery of the web 20 are blades 21, extending outwardly from the web 20, parallel to the shaft 18 and adapted to be rotated by said shaft in an annular passage between the peripheries of the flanges 14 and the cylindrical wall of the chamber 12.

The end plates 13 are provided with stuffing boxes 22 surrounding the shaft 18 and preventing leakage from the chamber 12.

The end plates 13 are also provided with other stuffing boxes 23 surrounding a second shaft 24 made in two parts with an enlarged cylindrical portion 25 on one part positioned within an enlarged cup-shaped portion 26 on the other part, and secured thereto by means of a pin 27.

The anges 14 have conca'vities 28 formed in the periphery thereof, into which a portion of the cup-shaped member 26 extends, the periphery of said cup-shaped member 26 closely fitting the wall of said concavity 28 and. preventing leakage from the inlet 29 of the casing 11 to the outlet 30 thereof, or vice versa.

having a depression 31 therein, extending longitudinally of the axis thereof and adapted to receive the blade 21 as the shafts 18, 24 rotate.

Midway of the depression 31 the gate valve 25, 26 is cut away at 32 to receive the Web 20 when the pump is in operation.

-QaBreferably the blades 21 have a dovetailed groove 33 extending lengthwise there. of in which is disposed a bar 34 of hardenedl material.

While there is comparatively no wear uponA the bar 34, under ordinary conditions,

it is possible in pumping some kind ofvma` The members 25, 26 form a gate valvev wardly extending brackets 15 on .n each of i cover 37 covering anvopening in the top of said housing through which the shaft lubrieating ring 38 is adapted to be admitted.

The top vof the housing 16 is similarly provided with an opening 39 through which the lubricating ring 40 for the shaft 18 may be admitted.

The shaft 18 extends through a gear casing 41 and has a pulley 42 secured thereto by which rotary movement may be imparted to said shaft 18. lVithin the gear casing 41 and keyed to the shaft 18 is a gear 43 meshing with a gear 44. secured to and rotating the shaft 24. y

The gear casing cover 45 is provided With a packing ring 46 surrounding the shaft 18 and preventing leakage of' lubricating oil from the gear casing.

The gear casing 41 is provided With a plug 47 closing the filling opening in the top of the gear casing and is likewise provided With a plug 48 which closes an opening in the bottom of the gear casing, through which the oil may be drained from the casing when desired.

rllhe housings 16 and 35 are respectively provided with plugs 49 and 50, closing openings through Which the oil may be drained from said housings.

Oil may be admitted to the housing 35 through the opening in the top thereof, closed by the cover 36, and the housing 16 is adapted to be filled with oil 'through a pipe 51 extending from one Wall thereofI and closed by a plug 52.

The housings 16 and 35 respectively have pipes 53 and 54 extending therefrom, having gages of any suitable construction which show the level of the oil in said housings 16 and 35.

In order to prevent hammering when the pump is in operation, a pipe 55 is provided, extending from the chamber 12 at a/point slightly in advance of one blade 21 when the other blade 21 has just passed the inlet 29. This pipe 55 leads to the outlet 30. and has a valve 56 therein.

The valve 56 may be opened to any desired extent to permit the material being pumped to flow from the discharge opening 30 into the chamber 12 to ill the space in advance of the right hand blade 21 When in the position shown in Fig. 4 of the drawings. y

The outlet 30 has a pipe 57 extending upwardly therefrom, communicating with a closed chamber 58 which, for convenience of illustration, is shown much smaller than it would be in practice. As the material being pumped is discharged into the yopening 30, any surplus material Which cannot be readily taken care of will enter the closed chamber 58 and compress the air therein.

This material will subsequently be forced from the chamber 58 by the compressed air therein to insure a continuous flow of material through the outlet 30 at all times.

The inlet 29 has a pipe 59 extending up-. Wardly therefrom v'from which pipes 60 and G1 extend in opposite directions. The pipe GO extends to an opening 62 communicating with an annular groove 63 in the cylindrical inner wall of one end plate 13, While a branch pipe (54 leading from the pipe 60 communicates with a passage 65 communieating with an annular groove 66 in the inner cylindrical Wall of the other end plate 13.

The pipes 6() and 61 are provided will` valves 67 and 68 regulating the flow ot' liquid through said pipes.

The pipe 61 leads to a passage 69 communicating with an annular space 70 in one end plate 13 and surrounding the shaft 24, this pipe 6l having a branch pipe 7l leading to a passage 72 communicating with a.' similar annular space 73 in the other end plate 13 and surrounding the shaft 24.

Opposite the annular grooves 63, 6G, 7() and 73 are rings i4 within the stuffing boxes 22, 23 dividing the packing material in said boxes in two parts, 75, 76.

It' the material being pumped leaks around the shafts through the packing parts 75 it will be drawn by suction through the pipes 60, 61, 59 into the inlet 29 and be carried with the rest of the material being pumped through the chamber 12 to the outlet 30.

With the bulk ot the material leaking from the chamber 12 disposed of in this manner it is obvious that the pressure upon the outer part 7G of the stuffing box packings will be reduced to a minimum..

This construction Wiil e'ectually prevent all leakage through the stuiiing boxes and this is particularly desirable where matcrials like gasolene are being pumped.

The pipe 55 may be omitted and a Vvalved passage in the casing provided for the said purpose.

By constructing a pump in the manner shown and described, the shafts carrying the piston and the Tate valve therefor may be mounted in bearings on outboard brackl ets considerably removed from the piston. blades 21, as no strain is brought' to bear upon said blades. In small sizes the bearings niay be mounted on outboard brackets but obviously in large sizes of pumps these 1( constructed so that the gate valve 25, 26 will 1 rial ahead of the blades as the Ashaft 18 rotates, and'cause a continuousv flow of the material from the inlet 29 to the outlet 30.

Owing to the concavity 28 in the flanges 14, and the accurate fitting of the gate valve 25, 26 into said concavity 28, the material being pumped cannot leak from the outlet S0 to the inlet 29.

It is believed that the operationl and many advantages'of the invention will be understood readily without further description.

Having thus described my invention, I

claim 1. A rotary pump comprising a casing having therein a cylindrical chamber provided with an inlet and an'outlet passage extending therefrom; a revoluble shaft; end plates on opposite sides of said casing having annular flanges extending toward each other with Atheir end faces separated and blades during thefrotation of said shaft;

and a valved pipe leading to said inlet and through which any portions of the material being pump 3d and leaking into said grooves may be withdrawn into said chamber.

2. A rotary pump comprising a casing having thereln a cylindrical chamber provided with an inlet and an outlet passage extending therefrom; end plates on opposite sides of said casing having annular flanges extending toward each other with theirend faces separated; a revoluble shaft; a member Secured to said shaft and positioned between the end faces'of said annular flanges; blades positioned between 'said annular flanges and the cylindrical Wall of said chamber and secured to said member; a re i voluble gate valve between said inlet and said blades during the rotation of said shaft; a shaft for said gate valve; means for rotating both shafts in unison; pipes leading from the inlet to passages surrounding both shafts; and means in said pipes for controlling the flow of material therethrough.

3. A rotary pump comprising a casing having an annular passage with an inlet and an outlet communlcating therewith; a revoluble member in said casing provided with a blade adapted to travel in said passage; a revoluble gate valve between said inlet and outlet having a peripheral depression to ref l ceive said blade as it travels from the outlet to the inlet; means for rotatingsaid member and gate valve in unison; and a passage froml the dischargeside of said annular passage to said outlet.

4. A rotary pump comprising a vcasin having an annular passage -with an inlet and an outlet communicating therewith; a revoluble member in said casing, provided with a blade adapted to travel in said passage; a revoluble gate valve between said inlet and outlet having a peripheral depression to receive said blade as it travels from the outlet to the inlet; means for rotating said mem ber and gate valve in unison; and a valved passage from the discharge side of saidannular passage to said outlet. 5. A rotary pump com rising a casing having a continuous annu ar passage with concentric inner and outer walls and of equal width throughout with an inlet and an outlet closely adjacent theretofand comv i municating therewith; a revoluble member in said casing provided with a blade extending the entire width of said passage and adapted yto travel therein, said blade having a broad inner face fitting the inner wall of said'passage; a revoluble gate valve between and adjacent to said inlet and outlet having `a peripheral depression the same length asvsaid blade and adapted to receive said blade as it travels from the outlet to the inlet, said gate valve consisting of a cylindrical member havingl said depression formed therein and fitting into the bore of another cylindrical member having a long opening in the wall thereof opposite said depression, the two parts of said valve vbeing secured together and each having a shaft extending from the closed end thereof;`and means for rotating said member and gate valve 1n unison. f

Signed by me at 746 Old South Bldg., Boston, Mass.,A this 18th day of July, 1923.

JUSTUS R. KINNEY. 

